Consider the circuit of Figure 9-24. A test performed on this circuit yields the result shown in

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Consider the circuit of Figure 9-24. A test performed on this circuit yields the result shown in Table 9-3. What is the probable circuit fault?


Table 9-3

Case 1 Case 2 Case 3 Counter 1 Counter 2 Counter 1 Counter 2 Counter 1 Counter 2 Actual Count 25 37 49 72 96


Figure 9-24

COUNTER SELECT TC QDQCQBQA S mi co Tens BCD CLK counter EN 4 Counter 1 TC TENS 74ALS157 lo MUX (tens) Za Zo

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Digital Systems Principles And Application

ISBN: 9780134220130

12th Edition

Authors: Ronald Tocci, Neal Widmer, Gregory Moss

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